define a set that contains noreturn syscalls

hardcode noreturn function list
Make LinuxSyscallsScript mark no-return functions
This patch makes the script ResolveX86orX64LinuxSyscallsScript.javarecognize syscalls that do not return, and mark these functions asno-return. The list of non-return functions is read fromElfFunctionsThatDoNotReturn.

Ghidra/Features/Base/ghidra_scripts/ResolveX86orX64LinuxSyscallsScript.java

@@ -65,6 +65,9 @@ public class ResolveX86orX64LinuxSyscallsScript extends GhidraScript {
 	//native "syscall" instruction
 	private static final String SYSCALL_X64_CALLOTHER = "syscall";
 
+	//a set of names of all syscalls that do not return
+	private static final Set<String> noreturnSyscalls = Set.of("exit", "exit_group");
+
 	//tests whether an instruction is making a system call
 	private Predicate<Instruction> tester;
 
@@ -179,6 +182,11 @@ public class ResolveX86orX64LinuxSyscallsScript extends GhidraScript {
 				}
 				callee = createFunction(callTarget, funcName);
 				callee.setCallingConvention(callingConvention);
+
+				//check if the function name is one of the non-returning syscalls
+				if (noreturnSyscalls.contains(funcName)) {
+					callee.setNoReturn(true);
+				}
 			}
 			Reference ref = currentProgram.getReferenceManager().addMemoryReference(callSite,
 				callTarget, overrideType, SourceType.USER_DEFINED, Reference.MNEMONIC);